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  2. Motor capacitor - Wikipedia

    en.wikipedia.org/wiki/Motor_capacitor

    Motor capacitors are used with single-phase electric motors [3]: 11 that are in turn used to drive air conditioners, hot tub/jacuzzi spa pumps, powered gates, large fans or forced-air heat furnaces for example. [1] A "dual run capacitor" is used in some air conditioner compressor units, to boost both the fan and compressor motors. [1] Permanent ...

  3. Capacitor types - Wikipedia

    en.wikipedia.org/wiki/Capacitor_types

    Air and vacuum capacitors: Not measurable Class-1 ceramic capacitors, NP0: 0.6% Class-2 ceramic capacitors, X7R: 2.5% Polypropylene film capacitors (PP) 0.05 to 0.1% Polyester film capacitors (PET) 0.2 to 0.5% Polyphenylene sulfide film capacitors (PPS) 0.05 to 0.1% Polyethylene naphthalate film capacitors (PEN) 1.0 to 1.2%

  4. Static VAR compensator - Wikipedia

    en.wikipedia.org/wiki/Static_VAR_compensator

    However, static VAR compensators are more expensive than mechanically switched capacitors, so many system operators use a combination of the two technologies (sometimes in the same installation), using the static VAR compensator to provide support for fast changes and the mechanically switched capacitors to provide steady-state VARs.

  5. Capacitor - Wikipedia

    en.wikipedia.org/wiki/Capacitor

    The maximum energy that the capacitor can store is therefore = = = The maximum energy is a function of dielectric volume, permittivity, and dielectric strength. Changing the plate area and the separation between the plates while maintaining the same volume causes no change of the maximum amount of energy that the capacitor can store, so long as ...

  6. Variable capacitor - Wikipedia

    en.wikipedia.org/wiki/Variable_capacitor

    Differential variable capacitors also have two independent stators, but unlike in the butterfly capacitor where capacities on both sides increase equally as the rotor is turned, in a differential variable capacitor one section's capacity will increase while the other section's decreases, keeping the sum of the two stator capacitances constant.

  7. Capacitance - Wikipedia

    en.wikipedia.org/wiki/Capacitance

    The energy (measured in joules) stored in a capacitor is equal to the work required to push the charges into the capacitor, i.e. to charge it. Consider a capacitor of capacitance C, holding a charge +q on one plate and −q on the other.

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